Prenatal Diagnosis of a Feingold Syndrome Pregnancy Complicated with Severe Preeclampsia: A Report of a Challenging Case.

Feingold syndrome (FS) is a rare congenital disorder with an autosomal dominant inheritance pattern. Two distinct subtypes are recognized based on their molecular pathology: FS type 1 (FS1) and FS type 2 (FS2). Both types share skeletal anomalies such as microcephaly, brachymesophalangia, and clinodactyly; however, gastrointestinal atresia is unique to FS1. Herein, we report a rare prenatal diagnosis of FS1 in a female fetus. The second-trimester ultrasound revealed bilateral clinodactyly and fetal microcephaly, and the subsequent molecular karyotyping identified a ~342 kb deletion at 2p24.3 encompassing the MYCN gene, confirming the diagnosis. The same deletion was detected in the father, verifying the hereditary pattern. The pregnancy was also complicated by preeclampsia and fetal growth restriction, leading to preterm caesarean delivery at 33 + 3 weeks of gestation. The neonate had microcephaly and clinodactyly but no gastrointestinal defects. In conclusion, high clinical suspicion aroused by identifying ultrasound features of FS can lead to early prenatal diagnosis via molecular karyotyping. Detecting accompanying gastrointestinal disorders that require early operation is crucial for the prognosis, genetic counseling, and prenatal management of the affected families.